二元地基基坑降水对周边地下水位影响研究  

Study on the influence of pumping of two-layerfoundation pit on the surrounding groundwater level

作　　者：何海清 李青青 杨进 杨辉 He Haiqing;Li Qingqing;Yang Jin;Yang Hui(Sichuan Institute of Geological Engineering Investigation Group Co.,Ltd.,Chengdu Sichuan 610072,China;Sichuan Xincheng Labor Service Co.,Ltd.,Chengdu Sichuan 610051,China)

机构地区：[1]四川省地质工程勘察院集团有限公司,四川成都610072 [2]四川新诚劳务有限公司,四川成都610051

出　　处：《山西建筑》2023年第17期104-107,148,共5页Shanxi Architecture

摘　　要：在设定抽水井及固定抽水设备后,基坑降水对周边一定距离的地下水位降深的具体影响处于探索阶段。成都市犀浦片区地基土呈典型的二元地基形式,以成都地铁某站台站基坑为例,通过抽水试验确定渗透系数及影响半径,并通过非线性拟合确定距抽水井一定距离处水位降深与距离满足ExpDec1模型,有利于类似地质条件下基坑降水对周边水位的影响的研究。After setting pumping wells and fixed pumping equipment,the specific impact of dewatering of foundation pit on groundwater drawdown at a certain distance around is in the exploration stage.The foundation soil in Xipu District of Chengdu is a typical two-layer structure,taking the foundation pit of a platform station of Chengdu Metro as an example,the author determined the permeability coefficient and influence radius through pumping test,and determined that the water drawdown at a certain distance from the precipitation well meets the ExpDec1 model through non-linear fitting,which provides some reference value for the study of the influence of foundation pit precipitation on the surrounding water level under similar geological conditions.

关 键 词：二元地基 抽水试验 基坑降水 水位降深 非线性拟合 

分 类 号：TU463[建筑科学—结构工程]